Publicité
Les langues disponibles
Les langues disponibles
4. Piping Installation
• Pitch the discharge piping down and away from the In-Row Cooler at a decline of 1 in. per 10 ft. (10 mm per 1 m).
• Use Type L ACR copper tubing.
• Install tube supports where necessary.
• When passing piping through a wall or other obstacle, use a brass cushion to prevent direct contact with the wall when
vibration occurs.
• Insulate the liquid line to prevent exposure to direct sunlight.
Notice the trap locations in Figure 4-2: Piping Trap Examples below. Traps installed in the discharge and liquid piping
prevent liquid backflow to the In-Row Cooler and help retain compressor oil when in standby or powered off.
P-Trap
Whenever the condenser is located above the In-Row Cooler:
• Install a P-trap at the lowest pitched point of the horizontal discharge piping.
• Install inverted traps or check valves at the condenser inlet and outlet.
• Install an S-trap every 20 ft. (6 m) of vertical height of the discharge piping when the installation vertical height is over
30 ft. (10 m). Refer to the Vertical Discharge Piping S-Traps table.
Table: Vertical Discharge Piping S-Traps
Vertical Distance
Less than 30 ft. (10 m)
30 to 40 ft. (10 to 12 m)
40 to 60 ft. (12 to 18 m)
60 to 65 ft. (18 to 20 m)
Note: Calculate the number of inverted traps from the total vertical height, not per individual vertical run. For example, two vertical runs
of 18 ft. each is a total of 36 ft., which requires one inverted trap.
Using the Equivalent Length of the Sub-Assembly table, multiply the equivalent length of each elbow type by the total
quantity of each elbow, based off Table: Recommended Piping Diameters.
S-Trap
Figure 4-2: Piping Trap Examples
Number of Traps
0
1
2
3
13
Inverted-Trap
Publicité
